"...good techniques to practice accurately firing a pistol while moving..." Why you'd be moving is beyond me, but keep your eye on the target. Exclusively. As daft as it sounds, if you have any kind of eye/hand coordination, you'll hit the target. No factory DA triggers though.
However, if you're thinking HD, you'll also be charged with assault and/or manslaughter. If you're claiming self-defence, advancing is not an option. The threat is gone.
"...Combat Handguns magazine..." Forget what you read in any of the gun rags.